Apache Solr DataImportHandler Code Injection Vulnerability

Exploited · KEV 2021-12-10CVE-2019-0193CWE-94

Exploited since 2021-12-10. No WAF vendor names it yet. Our CRS test: partly blocked.

Edge rules

0/8

Our test

Partly blocked

CVSS

7.2

EPSS

83.5% Top 0.3%

Posts, 14d

Published

2019-08-01

In Apache Solr, the DataImportHandler, an optional but popular module to pull in data from databases and other sources, has a feature in which the whole DIH configuration can come from a request's "dataConfig" parameter. The debug mode of the DIH admin screen uses this to allow convenient debugging / development of a DIH config. Since a DIH config can contain scripts, this parameter is a security risk. Starting with version 8.2.0 of Solr, use of this parameter requires setting the Java System property "enable.dih.dataConfigParam" to true.

Edge coverage

Claimed by vendors

CloudflareBefore feed historyOlder than its feedEnterprise: partly · Free: passed AWSBefore feed historyOlder than its feedWe measured: partly Microsoft AzureNo public claimNot named Google CloudBefore feed historyOlder than its feedWe measured: partly FastlyBefore feed historyOlder than its feed F5Before feed historyOlder than its feed AkamaiNo public sourceNo public changelog OWASP CRSBefore feed historyOlder than its feed

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Ask about CVE-2019-0193: who's covered, what to patch first, how vendors compare. I cite sources and won't help with attacks.

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Severity, decoded

CVSS 3.1

7.2High

High · 7.2 / 10

Exploitable over the network, with high privileges and no user interaction, leading to full loss of confidentiality, integrity and availability.

Over the internetAdmin login neededNo user actionWorks reliablyFull compromise

How the score is built8 metrics

Attack vectorAn attacker can reach it over the internet; no access to your network needed.
Network
Attack complexityNo special conditions are needed; the attack works reliably.
Low
Privileges requiredThe attacker needs an administrator-level account.
High
User interactionNo one has to click or open anything; the attack works on its own.
None
ScopeThe damage stays within the vulnerable component.
Unchanged
Confidentiality impactAn attacker can read all data the affected component holds, or the most sensitive parts of it.
High
Integrity impactAn attacker can change any data or files the affected component protects.
High
Availability impactAn attacker can take the component down completely or keep it from serving anyone.
High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA's assessmentSSVC, from the CVE record

ExploitationActive

Attackers are exploiting this in the wild.

AutomatableNo

At least one step needs hands-on work, which slows mass attacks.

Technical impactTotal

A successful attack gives full control over the affected software or all of its data.

Public exploits

1 found

0 Metasploit0 Exploit-DB1 Scanner template0 GitHub PoCs

NucleiCVE-2019-0193.yamldetection template, replayed in our lab

Links are to third-party code: never run it outside an isolated lab.

Timeline

2019-08-01
CVE published
CVE List
2021-12-10
Added to CISA KEV
Confirmed exploitation in the wild
2026-11-02
Our test: OWASP Core Rule Set blocked part of it
paranoia level 1, anomaly threshold 5, default CRS settings
2026-11-02
Our test: OWASP Core Rule Set blocked part of it
paranoia level 2, anomaly threshold 5, default CRS settings